2935 - minimize time that RAISE is disabled

I got sick of inserting 'Do_raise = true' when debugging tests.
2936
2937
2938
2939 - bugfix: keyword args
2940 - bugfix: keyword args

I was skipping the next keyword arg after a rest keyword arg.
2941
2942
2943

Less clever memory mgmt of keyword arg map.
2944
2945
2946
2947